Introduction: Neurodegenerative diseases (ND), such as Alzheimer's and Parkinson's, represent a growing challenge for public health worldwide. Various studies warn that their incidence continues to rise and they are expected to become the second leading cause of death after cardiovascular diseases in the coming decades. In this context, current scientific evidence highlights the need for effective preventive strategies, with dietary intervention emerging as a promising approach.
Methodology: A systematic review was conducted analyzing evidence regarding adaptogens with potential effects preventing neurodegeneration. Studies published between 2018 and2025 were identified in PubMed, ScienceDirect, and Google Scholar. Selection was based on their relevance to the safety and efficacy as preventive compounds against neurodegeneration.
Results: Polyphenols, B vitamins, and certain dietary patterns have shown beneficial effects on key mechanisms involved in neurodegeneration, including inflammation, oxidative stress and mitochondrial dysfunction. In particular, resveratrol, hesperidin, theobromine, quercetin, and oleuropein have demonstrated neuroprotective properties. These effects are associated with mechanisms including CaMKII/CREB/BDNF activation, which is linked to cognitive and anti-inflammatory benefits, microglial inhibition via MAPK/NF‑κB/PI3K/Akt, promotion of autophagy, blood–brain barrier protection, and mitigation of oxidative stress and neuronal apoptosis. These compounds can also be considered adaptogens, defined as natural substances that enhance the body’s resistance to physical, chemical, or biological stress while exerting a normalizing influence on physiological functions. Their multifunctional properties may help regulate stress-related pathways involved in neurodegeneration. These compounds can be sustainably sourced from agri-food by-products, including grape skin, citrus peel, cocoa waste, apple peel, and olive leaves, and can be incorporated into functional food products as a preventive strategy for ND while promoting a circular economy.
Conclusions: This systematic review explores the potential of these bioactive compounds in the development of functional beverages for ND prevention, discussing their mechanisms of action, limitations, and the estimated impact of their application.
